Valve for internal-combustion



PATENTE) FEB. 16, 1904..

G. E. SABGENT. VALVE FOR INTERNAL GGMBUSTIN ENGNBS.

APPLIUATON FILED APR. 27, 1900.

3 SHEETS-.SHEET 1.

N0 MODEL.

ze y' PATENTED FEB. 16, 1904.

C. E. SRGENT. VALVE FOB. INTERNAL MBUSTON ENGINES.

APPLICATION FLBD APB.. 2,7, 1900.

3 SHEETS-SHEET 2 E0 IGDEL.

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N0 MBEL.

G. E. SARGBNT.

VALVE POR INTERNAL GOMBUSTlGN ENGINES.

APPLICATION FILED APR. 27. 1900.

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PATENTE@ PEB, 1a, w 1

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UNITED STATES PATENT Orrien.

Bateman Februar-y 16, 1904.

CHARLES n. "SARGENT, or CHICAGO, ILLINOIS. -Assioxoa or Trinita F OURTHS TO OLYER S. LYFUHD, NEWT YORK, i Wi. HILLARD, TRUSTEE, OF CHICG, `ILLINOIS.

VALVE- Fon INTERNAL-CCMEUSTION ENGINES.

sPEeIFIcA'LiIoN forming part or Letters Patent. N. 752,303, datati February 1s,l 1904.

Appiicmmmed Apriizzieoo.' sean No. 14,555; momias To all whom. it iii/Cty1 concern: I

Beit kn'own that I, CHARLES-E. SARGEN'I?, a citizen of the United States of America, rel siding at Chicago, inthe county of Cookand 5 State'ot' Illinois, have invented certain new and useful Improvements in Valves for Internal-1 Combustion Engines, of

which the following is aspecification.,

My invention relates to certain improve; io ments in valves designed in connection with a valve intended for use in a class of internalcombustion engines in' which the admissionports are closed at some. intermediate point in the first forward or admission stroke of the I 5 piston in order that Aiii the Working sti-oke the gases maybe allowed to expand down to ap.

proximately atmospheric pressure, thereby converting the heat into work instead of lallowing it to escape in the exhaust.

of theJ piston during a portion of' the lirst for- Ward stroke. The admission-ports are then ton back,returningy to the engine the power which has been-employed in4` the expansion of l... Fig. 6 is `a horizontal section in line 6 6 of Fig. 7 is a horizontal section in line f '7 7 of Fig. 4. Fig. 8 `,is a'sideelevatonof; the piston portion of the valve; and Figis a similar elevationof the casing in'wliich said the-charge. Thenthe piston reaches the 3? point of cut-'oil on the first backward stroke,-

the compression above atmospheric' cour' inences and is contin ued upto a predetermined .-pressure, depending upon the per cent. vof clearance. The charge is then. exploded and 3 5 drives the piston down to tliecut-oii point in the ordinary manner, after which it 'continues to drive the piston to the end-of its stroke,y

and the gases expanding down to atmospheric pressure convert the heat into work, thereby 40 utilizing after passing the cut- 01T pointthe pressure .which is usually Wasted in ,the eX- haust.

The object of the invention is to provide for 'the use of a single valve for each explosion'- 45 chamber, to operate the saine` by ymeans'of a 'single cam and a single cam-lever, so that the construction may be assiinple as possible and falsoso that there may be but one irregularity 4 In these -zo engines the charge 1s drawn in by the suction the radiating-surface thereof.

vide an improved method of varyingthe rela tive proportionsof the ingredients consumed, also to make the vvarious parts of the' valve easy ofI operation, avoid clicking of tliesarne, and to provide means whereby the valve may be put into-a conditionfor opening lwithout the pressure within the cylinder.

It is also an object of 'the invention to proweight ofthe valve adjustable to any' desired force... To such ends the' invention consists incer-4 taihn characteristics which 'will fully appear from the following description and be definit-ely pointed out in theciair'ns. v

In the drawings presented herewith, Figure a vertical .section of the valve, showing the parts 'in adifferent position. Fig. a is-a simi-V lar view showing the parts in a third position. Fig. 5 is a horizontal section in line 5 of Fig.

Fig. 1

valve-chamber c3.' v' llfne valve-chaiiibe r conabushing B. (Shown in side elevation in Fig..

9.) .This bushing.containsinletports l1, airranged aroundits periphery ,and exhaust-ports f .let-portsl Theseportslopeninto suitable pas-.

1 is a vertical section transverse to the axis of I the cylinder of an' engine. Fig.f2 is a l iori.v zontal section'in line 2 2 of Fig. 1. Fig. 3 is -tains acylindrical boreof.; in whichissecured 90 v.. AND cIfIAIiLIJJsj in the inner contour of the cylinder to increase :5'o It i's also the object ofthe invention to pro- 'necessarily opening it, so as to niake said opening vdependent to a certain enter-it upon vide a sini'ple and convenient balance for'l the one end of the cylinder 'and extending to the` Zi', also arranged around the periphery of the i l a bushing and preferably parallelwiththe in-l k9s i sages in tliecasting, tliejiiilet-portsopening -c to turn it.

intothe passagebr chamber at except; at i limited portion thereof, (shown clearly in Fig. 7 and lettered afg) the limited` portion being intended for the introduction ot' gas or other combustible material, and the chamber ff for the introduction-of air which comes in through openings, portions of which are shown at .l7 in Fig. 5; The exhaust-ports empty into a chamber ag and the exhaust escapes therefrom l through an opening a, also partially shown 1 tral boss c2., in'whi'ch is guided a hollow stent d of a'pistonevalve D, the stem and boss hav'- lugaspline connection, (shownat c3. (ZC) This connection gives. the piston-valve a vertical movement-in thecap,l but causes the valve to rotate with the 'cap when. the latter is turned by the handlec. The pst0nvalve is a hollow shellconnected tothe stem byradial spokes 'or wings -It is slotted'circumferentially at al" to register in a certain position with the2 inlet-.openings bof the casing.v The slot does 'not extend quite aroundthe valve, being interrupted bya `solid portion d5, which may be brought bythe :rotation of `the valve before ythe openin'gsin the casing which connect with the air-chamber, or before thec openin g which co'nnects with the chamber (L2-through. which the combustible partfof the'cliarge is taken in.

ABy this mensthe relative size of 'the'open-j ings which drawin air and gas or other niaterial may'bechanged to admit varying prof portions ofthe same; The upper portion of he valve contains an outside peripheral'channel df". (Clearlyshown in' Fig. 8 and' in the various sections!) .This channel is of suicient widthto connect theeXhaust-ports With the vinterior of the valve-chamber, las is shown in Fig. 3, when"'thefpistonwalve isl'in its upper position. 11n lthis` position the exhaustisallowed to escape from the cylinder through the" chamber/0,8?? In the intermediate position of the valve'rshown in Fig.v l -this groove is'. lowered' entirely within the casing tol out off the eXhaust,'-andthe--inletioipenings of the valve" have 'not been lowered-far enough to reachthe inlet-ports b of the ca sing 'A' further'- down- 'ward movement of ,the valve brings it into the position seen in Figi, lin which the inletports are opened :into 'the interior Aof, thel valve.

' A puppetfvalv-E seats upon-the topI ofthe '.cjasing and has 'a stem e extending through the .hollow stern of .the piston-valve and terrr'iinatingvin' as'nialler'piston je Within aboli lbiv;nut -c'l7 screwedupon lthe lower en doff the pistonfvalvest em and guided: ivithin ar cyextending dowiiward roniih'e cup'( This nut fl', together with another just above it,

J", embrace between ,them an annular groove rf'," within which islitti-l a forlcf/ upon thevud of a lever pivoted jat to the frame and bearing yat itsopposite end a roller y/f", ruunilng upon a cani H, fast upon-a cam-shaft 71, journaled in suitable bearings on the cylinder lof the engine; :A Vspring l interposed between the nut 1] andthe cap C and tends to draw the forked end of the lever (1 down to guide the roller upon the surface-of the cam. rEhe surface of the cam is divided into three concentric portions /f' /12 lf3, the portion /f' corresponding to the intermediate position of the piston-valve shown in Fig. l, the portion if" corresponding to the highest positionof the exhaust-port is open, and the portion /f correspond-ing to the llowest position of the piston-val'vefshown in F ig. 4t, in which the inletports are open. The lmppet-'valve 1i acts as a closure both for thebushingof.thcvalve-caspiston-valve shown* in Fig. 3, in which the ing and for the piston-valve when the latter1 is suiiiciently raised.

The lower'face of the puppet-valve contains an annular gro'ove' adapted to receive the Lipper'end of the piston-valve', asseen in Fig. 3, and said groove is preferably made to lit-closely, so that an air-cushion may be obtained toavoid theclickingof the two valves when they come together. Furthermore, the

inner wall of the groove lapsover'the'inside surfaceof the piston-valve when the latter is `1n its intermediate or normal position, as seen" in Figfll, causing the"puppet-valve to cut' oli' connection'between the cylinderv and 'the interior of the piston-valve slightly in advance of the seating' of the'puppet-valve.'upon the bushing.

The nut ff has a'slnall perforation vat d toadnnt atmospheric pressure above the IOO piston e', and'lthefairwithin the chamber below `acts asa spring" toja'ssist inthe raising of the puppet-'valve'when the Ipistion-valve in the position seen in' Figg, in which the c'a'- pacityof the chamber is reduced by the low-A ering of the nut.- :A petcochd provides means for allowing air 'to escapeor to' enter,-

as -tlie case may b'e,to vadjustth'e pressure within thech'arnbeif;

rio

The wings o1`"bridges Z2-are curved from the stem to the valve, .soaStQpreventthem from` forming rigid 'struts between 'the stem' and the louter'fwallot thej'valve," lhis is done so that f .the expansionand contraction 'ofA the wings needniot..I iecessarily force the; -outer wall of` the valve outof round, but maj becoinpen- -sated for" byan increase: rd'ecrease of 'the curg tion -in which' the.A charge isf 'entering-lie C Vlvvalve may cause `the puppet-valve to rise fromA 51 capacitydofthe' chamber in "tlie'cup F,"caus *ing an. upward pressure upon the piston e",

and assisting-theraising ofthe 'puppet-valve. E, so that the entire `weight of said valve need .not necessarily befoveijcorne by suction. fromrbfwithinthefcylinder. The position `of the part-s remains the saine until the Vroller .leaves thev part-.biot the cam. tif-hen vthecarn has'advanced, in .the direction of the arrow 3116i-- ciently t'obring the 'part le. under the roller,

-t Sithepistn-valve has risen sufficiently to close theinlet-ports andjincrea-se the capacity of the chamber Within thecup Ras seen'in'Fig. l, removing. theupward .pressure upon the pistone' andan the same-time cutting od the'supze' pljv1 of' 'gas and air, ,sov that `tl 1e`puppetvalve seats itself yb v'its' ownf gravit;v or by Asuction upon the piston e if the, tension of'the air within the .chamber is. -such. as to assist the downward movement, and thispositioncon'- tinues during the' remainder of the forward vsti-okeofthe. piston, all-.ot` the backward or compression-stroke of the engine, andallot the second forward o i vworking stroke. During the remainder of the'tirst forward stroke the ex'pansionpi the charge caught within the- "time to time; but its return cuts off the ow of gasjbefore the valve seats, so thatno chatftering o'ccurs.y At the end ot' the working '35; stro`ke the cam H has advanced sutlicientlv to bring the highest part if beneath the roller, raising the'piston-valve upward against the puppet-valve and carrying the latter with it against the pressure within the cylinder into '40 the position seen in Fig. 3, where the exhaustports are connected with the interior ot -the .cylinder and the'exhaust flows into the exhaust-chamber and thence into the .atmosphere. This completes the. c vcle, andas the i roller runs od of the part if of.' the cani onto the depression if the parts resume the original position (shown in Fig. et) for the admission of a new charge.

Much of the novelty herein more or less conif'pl-ications SerialNos. 14,553, 14,556, 131,063,

and 131,309.

,The principal features of the invention are not necessarily dependent upon the 'exact devicesand forms of arrangement thereof, and for this reason -I do not limit myself tothe. specific details of construction above de- .pletely disclosed is claimed in m5Y pending ap- 1. Thecombinationwith a combustion-cylinder and inletand discharge ports therefor;r` of a reciprocating piston-valve provided 'withchannels adapted to connect' said .portal-reciprocates, and afvalr'e arranged to close one ot said channels while the other is open; 2.. In a device of the classdes'cribed, the cominletan'd exhaust ports, of a piston-valve therein provided with an outside channel adapted 1n a gir-'en position ofthe valve to connect the aside channeladapted in a given position of the valve to connect the inlet-ports with thel cvlinder, and having portions adapted in either ofsaid positions to cut oft the other port-, andva puppetvalve adapted to close the inne-r chan 'tialLv as se t`t'oxtl1.

3. ,-I'nadevice of the class described, the combination Vwith a piston-valve 'provided with channels adapted respectively to govern the inlet 'and exhaust ports, of a puppet-valve adapted toclose one of these channels Awhen theother is open; substantially as described. et. The combination with the combustioncylinder, of a reciprocating valve arranged to open and close the inlet-port as it moves transversch.v with reference thereto to dilierent po-l sitions, a second independentlv-movable valve carried by the first, arranged to cuto' conirnunication between the tirst valve and the cylinder. and means for closing the second valve during the combustion of the charge.

5. Inad'evice ofthe class describe-d, the combination with. a cylinder having a suitable valve-cl1amber,an eXhanst-portand inlet-ports for air and combustible material respectively, or' a valve having channels adapted to alter- A natelhv connect the exhaust-port and the/inletports with the cylinder, said valve being ca- -pable of reciprocating movement in one direction to open and close the ports and in l the inlet-ports; substantiall)v as described.

6. In a device of the class described, the combination with a cylinder vprovided lwith a cylindrical valve-chamber having a suitable exhaust-port-and inlet-ports for the air and gas respective-Lv, of a. piston-valve iitted to saidy chamberhaving passages adapted to alterthe cylinder, means for moving said piston. longitudinally to open-and close the respective ports and 'means for moving it angularb` to vary the relative size of the inlet-ports; substantially as described.

fi. The combination with a hollowrns'tonvalve, ofal puppet-valve seating upon one end to receive-said end and provide an air-cushion; substantially as described. y 8. In a device of theclass described, the combination witha piston-valve. and a puppetspectively, withA the cylinder as. the valve ref.'

exhaust-port with the-cylinder 'and with an.

nelwheln the outside channel is open substananother direction .to var v the relative size of bination with a valve-'chamber provided with IOC.

nat-ely connect the exhaust and inlet ports with thereof', and provided with'a groove adapted vulve of a stem for the puppet-ifalveand a`pisvsind chattel'jinguon the.semi-iis'l iii'ided Subton upn the valve-stem Within ,the chambe provided with means kfor varying its capacity, Y A 4 11a-niet Chicago, in che .county of Cook and i 5 -State of lllinils, this -19th day-vof vApifilf D., ,1

by the movementof the pistongv'alvb; substantially as described.

5% In a device of the class described; `the com#4 binab'ron with a suitable Valve-.opening and valve-Semp, of a puppet-Valve fitted ,to said seat l and means for closing 'thenopening prier tp the seating of the Valve, wherebyy the move- `ments of the valve toward lits seat aie 'checked 'stantially asdesciribed. 1 v

Witnesesz y CHAS.' O. SHERVEY, S'BLISS. K.

CHARLSSRGENT. 

